Add parallel letter exercise#745
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ryanplusplus merged 9 commits intoexercism:mainfrom Apr 20, 2026
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Co-authored-by: Ryan Hartlage <2488333+ryanplusplus@users.noreply.github.com>
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resolve #585
Could be intresting to explore this exercise once 1.19 is implemented, Crystal is working heavily on multi threading. I thought about implementing this exercise earlier, but skipped due to feeling that the language wasn't ready. This solution supporse multi-threading but is still slower than a single threaded solution. With 1.19 it feels like multi-threading support will be more stable and could perhaps be faster than single threaded.
Also this requires the test runner to allow multi-threaded execution.